Question

Describe the periodic nature and properties of atoms and molecules.

Answer 1

The elements in the periodic table are arranged according to atomic number. Atomic number indicates the number of eletrons or number of protons that particular atom contains. For achieving an octet number of eletrons, all atoms either gain or loose eletrons.

Rows in the periodic table are called periods. Columns in the periodic table are called groups.

From left to right in a row of the periodic table, the properties of the elements gradually change. At the end of each row, thee is significant change in Chemical prpoperties .

The next element in order of atomic number is chemically similar to the first element in the row above it; leading to formation new row on the table.

Elements in a given group in the periodic table resmeble in chemical and physical properties. for example helium resembles Argon in physical and chemical properties